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no worries, this is new territory for everyone.
this is not really profitable with a macbook or phone, if you have a good gaming pc in your house this might be profitable for coins with a "low" difficulty, like Aeon ;)
The price development of the coins is of course to be considered. If you mined ETH already last year for 10$ thid was not really profitable in 2016 maybe even a negative business case, but now with a price of 300$ every single ETH miner from last year is sure happy and rich as hell ;)

I think so, too.